Current Stable Release: OpenCPN 5.6.2 Maintenance Release April 22, 2022
Read the Update Summaries.
Other Resources
Another technique is to use HTTrack Website Copier and download/mirror the html help files. Download it and make mirror a copy of the current manual to your computer. Don't forget too add filters so that file links are not downloaded! See FAQ For example, add file filters for -*.zip, -*.7z and any other linked files you do not want downloaded.
Getting started using OpenCPN consists of 4 basic steps: